Question

a bird in air looks like a fish vertically below it and inside water in a tank. if the distances of the fish as estimated by the bird is S1 and that of the bird as estimated by the fish is S2 then the refractive index of liquid u is?

Answer 1

Explanation:

 1/f=(u-1)(2/R)

1/f=(1.5-1)(2/R)

1/f=0.5×2/R

f=R

since the object is at infinity therefore the image would be formed at focus.